Watch the video below and be amazed as a diver swims around fallen pieces of an ancient civilization.
The lost city was called Heracleion by the Greeks, and Thonis by the Egyptians and is believed to be 1,200 years old.
Dr. Franck Goddio, an underwater archaeologist, is the man who found this amazing discovery.
Why did Heracleion/Thonis end up under water? What could have happened to hide this city for so long? A natural disaster?
No one knows for certain, and perhaps we never will.